Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Se o total for 6, qual é o R máximo?
 ###Tabelas: CREATE TABLE league_champions_and_major_awards (league_champions_and_major_awards_id AUTO_INCREMENT PRIMARY KEY, Year INT, League Champion VARCHAR, Best Blocker VARCHAR, Rookie of the Year VARCHAR, C.A.N.T.S.L.E.E.P. Award VARCHAR) CREATE TABLE provinces_since_the_division_of_korea (provinces_since_the_division_of_korea_id AUTO_INCREMENT PRIMARY KEY, RR Romaja VARCHAR, M–R Romaja VARCHAR, Hangul/Chosongul VARCHAR, Hanja VARCHAR, ISO VARCHAR, Area VARCHAR, Capital VARCHAR, Region VARCHAR, Country VARCHAR) CREATE TABLE assists (assists_id AUTO_INCREMENT PRIMARY KEY, R INT, Player VARCHAR, Position VARCHAR, League INT, Champions League INT, Copa del Rey INT, Total INT) CREATE TABLE table_of_forms (table_of_forms_id AUTO_INCREMENT PRIMARY KEY, English VARCHAR, German VARCHAR, Dutch VARCHAR, Latin VARCHAR, Romanian VARCHAR, Portuguese VARCHAR, Spanish VARCHAR, Italian VARCHAR, French VARCHAR, Greek (Modern) VARCHAR, Bulgarian VARCHAR, Macedonian VARCHAR, Polish (extinct) VARCHAR) CREATE TABLE supplemental_first_round_selections (supplemental_first_round_selections_id AUTO_INCREMENT PRIMARY KEY, Pick INT, Player VARCHAR, Team VARCHAR, Position VARCHAR, Hometown/School VARCHAR)  
SELECT MAX R FROM assists WHERE Total = 6